2151784344 has 16 divisors (see below), whose sum is σ = 5379460920. Its totient is φ = 717261440.

The previous prime is 2151784337. The next prime is 2151784361. The reversal of 2151784344 is 4434871512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44828817 + ... + 44828864.

Almost surely, 2^2151784344 is an apocalyptic number.

2151784344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2151784344 is an abundant number, since it is smaller than the sum of its proper divisors (3227676576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2151784344 is a wasteful number, since it uses less digits than its factorization.

2151784344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89657690 (or 89657686 counting only the distinct ones).

The product of its digits is 107520, while the sum is 39.

The square root of 2151784344 is about 46387.3295631469. The cubic root of 2151784344 is about 1291.0198341247.

The spelling of 2151784344 in words is "two billion, one hundred fifty-one million, seven hundred eighty-four thousand, three hundred forty-four".